21201880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75721}}^1$

素因数の和:75739

約数の個数: 32

約数和(自身を含む): 54519840

約数和(自身を除く): 33317960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75721, 151442, 302884, 378605, 530047, 605768, 757210, 1060094, 1514420, 2120188, 2650235, 3028840, 4240376, 5300470, 10600940, 21201880]

約数ペア:

[(1, 21201880), (2, 10600940), (4, 5300470), (5, 4240376), (7, 3028840), (8, 2650235), (10, 2120188), (14, 1514420), (20, 1060094), (28, 757210), (35, 605768), (40, 530047), (56, 378605), (70, 302884), (140, 151442), (280, 75721)]